How can I store such a large number in C

Question

#include<stdio.h>
#include<string.h>

int
main ()
{
long long num;
int n;
int divisor;
scanf ("%d", &n);
num =
(10000 * 100000000000000000000 * 100000000000000000000 *
100000000000000000000)
if (1 < n && n < (num -1))

if (n % 9 == 0)
printf ("divisibilidad!");
if else
printf ("no es multiplo");

return 0;
}

Answer 1

How large?

Answer 2

10^64-1

Answer 3

I think is too big for long long int type

Answer 4

Try double. He's can have 10000000000000000000000000000000000, easy. But he cant have 10000000000000001 :-(